MJE13003 1.5A 400V NPN Bipolar Silicon Power Transistor TO-126

MJE13003 1.5A 400V NPN Bi-polar Silicon Power Transistor TO-126 is a robust NPN Bi-polar Junction Transistor (BJT) specifically engineered for high-voltage, medium-power switching applications. It features a high collector-emitter breakdown voltage (V_CEO) of 400V and a continuous collector current (I_C) rating of 1.5A, making it highly suitable for handling power line voltages. Consequently, this transistor serves as an essential component in compact power supplies and various motor control circuits where space is limited and reliable high-voltage switching is necessary. Packaged in the durable, easy-to-mount TO-126 form factor, the MJE13003 effectively manages power dissipation. Therefore, designers frequently utilize this model when they require cost-effective, high-speed switching capability in consumer and industrial electronics.

Key Features:

• High Voltage Capability: Offers a V_CEO rating of 400V, allowing the device to switch high-voltage lines typically found in AC-to-DC conversion circuits.
• Medium Power Handling: Capable of handling a continuous collector current (I_C) up to 1.5 A, suitable for driving small motors, relays, and power MOSFET gates.
• High Speed Switching: Exhibits fast switching times, which is critical for minimizing power loss and increasing efficiency in switching regulator designs.
• Compact TO-126 Package: The plastic TO-126 case provides a good balance between size and power dissipation capability, ensuring easy mounting onto small heatsinks.
• High Temperature Performance: Designed to operate efficiently across an industrial temperature range, guaranteeing reliable performance in harsh environments.

Technical Specifications:

• Transistor Type: NPN Bi-polar Silicon Power Transistor
• Collector-Emitter Voltage (V_CEO): 400 V
• Collector-Base Voltage (V_CBO): 600 V
• Emitter-Base Voltage (V_EBO): 9 V
• Continuous Collector Current (I_C): 1.5 A
• Peak Collector Current (I_CM): 3 A
• DC Current Gain (h_FE): Minimum 8 (Tested at I_C = 0.5A, V_CE = 5V)
• Maximum Power Dissipation (P_D): 20 W (T_C = 25°C)
• Junction Temperature (T_J): ≤ 150°C

Mechanical Specifications:

• Package Style: TO-126 (Plastic Encapsulated)
• Mounting: Through-Hole Technology (THT)
• Thermal Resistance (Junction to Case): R$_{\theta JC}$ ≈ 6.25 °C/W
• Lead Material: Tinned Metal Leads

Dimensions:

• Body Width: ≈ 7.8 mm
• Body Height: ≈ 10.0 mm
• Lead Pitch (E to C to B): 2.3 mm (Standard)
• Mounting Hole Diameter: ≈ 3.0 mm (For screw or clip attachment)

Pinout and Wiring:

• Pin 1 (Emitter, E): Connects to the circuit ground or low-side reference.
• Pin 2 (Collector, C): Connects to the load and the high voltage supply rail (The metal tab is usually internally connected to the Collector).
• Pin 3 (Base, B): Connects to the input control signal via a current-limiting resistor (R_B).
• Wiring Note: Ensure you drive the Base pin with sufficient current to achieve saturation when the transistor acts as a switch, furthermore, always use a heatsink when operating close to the maximum power dissipation limit.

Datasheet Reference:

• Download ON Semiconductor MJE13003 Datasheet

Commonly Used in:

• Switch Mode Power Supplies (SMPS): Essential components in the switching stage of low-to-medium power SMPS circuits.
• CFL and LED Drivers: Used to manage the high-frequency switching required for ballast and lighting driver circuits.
• Battery Chargers: Incorporated into the control loop or switching stage of various portable device charging systems.

Applications:

• High-Frequency Inverters: Generating high-voltage AC waveforms from DC sources in small inverter designs.
• High-Voltage Drivers: Controlling relays, solenoids, or high-power MOSFETs that operate off the main AC line voltage.
• Voltage Regulation: Forming part of series or shunt regulators where high voltage tolerance is needed.

Equivalent Models:

• FJP13003 (Fairchild/ON Semi): A commonly available cross-reference component offering similar electrical characteristics and packaging.
• S8050 (Low-Power Alternative): While having lower voltage and current ratings, it serves a similar general-purpose switching function, however, it is not a direct high-voltage replacement.
• TIP41C (Higher Current/Lower Voltage): This is a popular alternative if the application requires higher current (up to 6A) but can tolerate a lower breakdown voltage (V_CEO = 100V).

Package Includes:

• 1 x MJE13003 1.5A 400V NPN Bipolar Silicon Power Transistor TO-126